I would change to another available resort and pocket all that coin ;-)
Unfortunately some room types are always excluded. Would a moderate room hold your party size? Would you have to do two rooms, and would it be cheaper? Give them a call and see what the price difference is.
I'm looking into other resorts now. We would need 2 rooms because we are taking my parents also. Which might work better because they didn't really want the dining plan ~ they split their meals a lot, but since we were all in the same room we had to add it for them too. We would need connecting rooms though ~ my girls want to spend some time with them, and they'll watch our baby while we take the girls out in the evenings.